if it is anything like the one I tore into the "encoders" may surprise you
on that one they were an odd type with raised spiral magnetic arms
spinning over opposite spiraling traces on the pickup board with a
daughter card to convert the signals
nothing like the slotted disk optical encoders I was expecting
you might be able to use the motors with the original main board and
build a stronger gantry to hold the drill rig ,HP claims a resolution of
1/40th mm on those plotters but the motors aren't any bigger than they
need to be to move the original parts (paper and pen holder)
maybe if you use a belt reduction to get more torque and scale up
the HPGL output to get it back to the right size?
Brian
--
"Nemo me impune lacesset"
> > That plotter has servos with encoders! Whiz-bang thang, it is!
> If it has encoders then it is pretty valuable. at least to me.
> it would be a great start for a pcb driller. encoders help make the
> unit more accurate than steppers.
>
> even without the encoders, the DC servo motors can be used as a
> drilling head.
>
> I guess when I pull it apart, I'll find out !
>
>
> Dave